Detailed LOH map of chromosome 6q was assembled using 15 microsatellite markers. Thirteen cases that showed LOH at 1 or more loci are presented. Status of each locus is indicated: (horizontal stripes) retention of heterozygosity; (falling stripes) not informative; (vertical stripes) microsatellite instability; and (black) LOH. Numbers of patients are listed at the top of each column. LOH hot spots at 6q21-22.1 (♦) and 6q23.3-25 (♠) are indicated.